It lurks along highways and airways. It’s found in lobbies and taxis. It’s difficult to track, hard to control — and impossible to live without. It is, of course, the mobile beast: the indispensable ...

If your laptop has an LTE or 5G adapter and thus a fast Internet connection, you can use it as a mobile Wi-Fi hotspot to connect other devices in the vicinity to the Internet, such as your smartphone, ...